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When Peter accidentally kills his father it jogs his memory that Francis once told Peter he wasn't his real father. After Thelma tells him that his real father actually lives in Ireland Peter and Brian travel there to find him. Meanwhile, after Lois hits Stewie he discovers that he loves being spanked, and does everything possible in order to get spanked again.
Peter's father, Francis, dies in this episode.
Name of the Tavern where Peter's Dad is well known: Wifey McBeaty's Tavern
Peter's biological father's name is Mickey McFinnegan.
Peter: Uh, Meg, uh, I got 16 candles for your birthday cake. How does that sound?
Meg: That's not right.
Peter: So...less...? More...? Too many...? Not enough...?
Meg: You stupid son of a bitch! You don't even know how old I am!
Lois: Meg, that kind of language is not appropriate for a girl your age...or...is it?
Meg: I'm going to be 17, you jerks!
(Meg runs out of her room)
Peter: She's the jerk.
O'Brian: Whose leg do I have to hump to get a Guinness around here?
Quagmire: (to three girls at Meg's party) So the man asks the bartender to recommend a good drink, and the bartender says a grasshopper. So the guy orders a grasshopper. Then he's walkin' home, and along the way he notices a grasshopper on the ground. So he says to the grasshopper, "Hey, you know there's a drink named after you?" and the grasshopper says "You mean there's a drink named Irving?"
Quagmire: So which one of you wants to lose your virginity?
Lois: You really gotta stop misbehaving, you're gettin on mommy's nerves.
Stewie: Well, you know what will ease your stress? Slap me across the face like a bitch.
Lois: (sighs) It's all right, everybody makes mistakes, I'll get some Windex.
Stewie: Come on, discipline me. Make me wear panties, rub dirt in my eyes, violate me with a wine bottle...(to himself) my god I really have problems don't I?
Asian Santa: (speaking very quickly) What you want? What you want for Christmas?
Stewie: Um, I was thinking maybe one of those old timey-
Asian Santa: (speaking very quickly) Too late! Take too long! Sad Christmas! (throws away Stewie and an Asian kid climbs on his lap) What you want?
Asian Kid: (speaking very quickly) Fire truck!
Asian Santa: (speaking very quickly) What color?
Asian Kid: Red!
Asian Santa: Next! (throws kid)
Stewie: I haven't been this scared since Mother Teresa OD'd in my car.
(Flashback; Stewie is driving a car, two drug addicts are in the back seat, inbetween them is a cleary OD'd Mother Teresa)
1st Addict: She is messed up man!
Stewie: Shut up! Just Shut up! Let me fucking think!...Push her out!
2nd Addict: We can't leave her alone.
Stewie: Push the bitch out!
The taxi that drives Peter and Brian around Ireland drives on the right side of the road, however in Ireland they drive on the left side of the road.
After Stewie knocks his cup of juice off his high chair the sound of glass breaking is clearly heard. However, when the scene pans out there is glass on the floor but the cup on the ground is broken. Why would a baby be drinking from a glass cup anyway?
Peter's Two Dads
The episode's title is a reference to the show My Two Dads.
Peter: That'll do pig, that'll do.
Peter's line is a reference to the 1995 movie Babe, which was a movie about a talking pig and his adventure. At the end of the movie Farmer Hoggett says Peter's line to Babe in order to show respect and appreciation for how much he has helped him.
Peter and Brian fly to Ireland on Jet Green, which is a reference to the airline Jet Blue. It was probably changed to Green because Ireland's color is green.
Cleveland: You're welcome!
Cleveland's gift to Meg was the first Season of Sister, Sister, a hit Disney Channel show about two twin sisters who are seperated at birth only to accidentally reunite 14 years later.
Failure to Launch
Peter's mentions that he could only make it half-way through Failure to Launch, which was a 2006 movie starring Matthew McConaughey and Sarah Jessica Parker.
The part where Peter burries Francis in the pet cemetary only for Francis to jump out of his grave is a reference to the Stephen King novel Pet Cemetary, in which a young boy burried in a pet cemetary comes back to life, but is much more violent than before.
When Peter spins around and is suddenly dressed up like a female superhero; this is a reference to Wonder Woman, a famous DC comic superhero who changed into costume this way.
Anakin Skywalker: Hi, I'm Hayden Christensen.
The part where the three spirits give Peter advice; those three spirits are Star Wars characters. The way they are seen there is the way they were seen at the end of Star Wars IV: Return of the Jedi. The part where Hayden Christensen is a joke at the fact that in the "Remastered" DVD of Return of the Jedi Hayden Christensen digitally replaced the original Anakin Skywalker (Sebastian Shaw), which upset many fans of the series.